Tapered-land thrust bearing device

Abstract

A tapered-land thrust bearing device including a disk-shaped bearing member and a race member. The bearing member has a tapered-land face on which tapered surfaces and flat-land surfaces are successively formed, along the peripheral direction. The race member is arranged to contact the tapered-land face of the bearing member.

We claim: 
     
       1. A tapered-land thrust bearing device adapted to be disposed between two members rotating relatively to each other and to bear a thrust force exerted by said relative rotation members, said thrust bearing device comprising: a disk-shaped bearing member adapted to be engaged with one of said relative rotation members and having a tapered-land face on at least one side, said tapered-land face comprising tapered surfaces and flat-land surfaces successively formed along the peripheral direction thereof; and   a race member comprising a radially extending wall having a face which is adapted to be engaged with the other relative rotation member and an opposite-side face arranged to contact said tapered-land face of said disk-shaped bearing member by the thrust face to define a sliding surface therebetween, a peripheral wall axially extending from the periphery of said radially extending wall to define a retainer for receiving said disk-shaped bearing member, and retaining means integrally formed with said peripheral wall at a free end thereof for preventing said disk-shaped bearing member from falling away from said race member.   
     
     
       2. A device as set forth in claim 1, wherein said retaining means comprises several projections each projecting inwardly from said peripheral wall. 
     
     
       3. A device as set forth in claim 1, wherein said retaining means comprises several notches each bent inwardly from said peripheral wall. 
     
     
       4. A device as set forth in claim 1, wherein said retaining means comprises an end portion uniformly inward folded at the free end of said peripheral wall. 
     
     
       5. A device as set forth in claim 1, wherein said race member has oil communicating ports in said peripheral wall thereof. 
     
     
       6. A tapered-land thrust bearing device adapted to be disposed between two members rotating relatively to each other and to bear a thrust force exerted by said relative rotation members, said thrust bearing device comprising: a disk-shaped bearing member adapted to be engaged with one of said relative rotation members and having a tapered-land face on at least one side, said tapered-land face comprising tapered surfaces and flat-land surfaces successively formed along the pheripheral direction thereof; and   a race member comprising a radially extending wall having a thickness of 0.05 to 1.0 mm and having a face which is adapted to be engaged with the other relative rotation member and an opposite-side face arranged to contact said tapered-land face of said disk-shaped bearing member by the thrust face to define a sliding surface therebetween.